Re: [PATCH v2 0/9] Fix _scratch_mkfs_sized() for btrfs

[Qu Wenruo <quwenruo.btrfs@gmx.com>]

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On 2018/9/25 下午12:24, Anand Jain wrote:
> v1->v2: Fix the min size for _scratch_mkfs_sized() to 256MB for btrfs and
>          add comment about its ref.
> 	Fix _scratch_mkfs_sized() options to use at least 256MB in each
> 	 test case.
>         Update change long.
> 
> Currently _scratch_mkfs_sized() checks if the requested size is below 1G
> for btrfs and forces the --mixed mkfs option. The 1G size cut off is too
> larger where the actual size is ~256mb. The patch 1/9 fixes the
> _scratch_mkfs_sized() to check for 256mb instead.

From the aspect of btrfs, the change to 256m totally makes sense and
avoids complex profile probing.

The patchset looks good to me.

Reviewed-by: Qu Wenruo <wqu@suse.com>

However I'm wondering if other fses is OK to increase the minimal fs size.
AFAIK btrfs has the largest minimal dev size requirement among
xfs/ext4/btrfs, so it should be OK, but still needs extra confirm from
xfs/ext4 people.

Thanks,
Qu

> 
> Also fix the test cases requesting to create FS below 256mb. And open
> code the fssize computation where possible (that is the variable used
> is only used once).
> 
> Further, there are test cases generic/250,252,256,416 which uses
> _scratch_mkfs_sized with < 200mb but its fix isn't straight forward
> and they are not yet ready for the review.
> 
> The affected testcases (which calls _scratch_mkfs_sized) [1] have
> been tested on btrfs. And the test cases [2] which are being patches
> here are tested on xfs ext4 and btrfs for no regression.
> 
> [1]
> generic/015 generic/027 generic/077 generic/081 generic/083 generic/085 generic/096 generic/102 generic/171 generic/172 generic/173 generic/174 generic/204 generic/224 generic/226 generic/250 generic/252 generic/256 generic/269 generic/270 generic/273 generic/274 generic/275 generic/300 generic/312 generic/320 generic/333 generic/334 generic/361 generic/371 generic/387 generic/399 generic/416 generic/427 generic/449 generic/459 generic/466 generic/488 generic/505 btrfs/004 btrfs/007 btrfs/132 btrfs/170
> 
> [2]
> generic/015 generic/077 generic/083 generic/387 generic/449
> 
> Anand Jain (9):
>   fstests: btrfs: _scratch_mkfs_sized fix min size without mixed option
>   generic/015 fix to test the default non-mixed mode
>   geneirc/077 fix min size for btrfs
>   generic/083 fix btrfs fs size for default mode
>   generic/102 open code dev_size _scratch_mkfs_sized()
>   generic/204 open code SIZE for _scratch_mkfs_sized()
>   generic/312 open code fs_size _scratch_mkfs_sized()
>   generic/449 fix fs size for _scratch_mkfs_sized for btrfs
>   generic/387 fix _scratch_mkfs_sized option for btrfs
> 
>  common/rc         | 4 +++-
>  tests/generic/015 | 8 +++-----
>  tests/generic/077 | 3 +--
>  tests/generic/083 | 2 +-
>  tests/generic/102 | 3 +--
>  tests/generic/204 | 3 +--
>  tests/generic/312 | 7 +++----
>  tests/generic/387 | 3 ++-
>  tests/generic/449 | 4 ++--
>  9 files changed, 17 insertions(+), 20 deletions(-)
> 


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